1) Consider the magnetic field ( B ) of a wire with a constant current (I). A Ma
ID: 1425603 • Letter: 1
Question
1) Consider the magnetic field (B) of a wire with a constant current (I). A Magnetic Field sensor is placed at a radius (r). Will the magnitude of the magnetic field change if the sensor was moved around the wire while holding the current and radius constant?
Yes or no.
2) Consider the magnetic field (B) of a solenoid. Which of the following are physically possible and could increase the magnetic field.
a) Increasing N
Decreasing N
Increasing I
Decreasing I
Increasing L
Decreasing L
a) Increasing N
b)Decreasing N
c)Increasing I
d)Decreasing I
e)Increasing L
f)Decreasing L
g)Increasing
Explanation / Answer
1) Yes, the magnitude of the magnetic field change if the sensor was moved around the wire while holding the current and radius constant.
2) Magnetic field of a solenoid = B = uNI/L
so B will increase with increase in N and I and with decrease in L ====> so a) c) and f) is correct.
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